Conserved Composition of Nod Factors and Exopolysaccharides Produced by Different Phylogenetic Lineage Sinorhizobium Strains Nodulating Soybean

Wang, Dan; Couderc, François; Tian, Chang; Gu, Wenjie; Liu, Li Xue; Poinsot, Véréna

doi:10.3389/fmicb.2018.02852

Cited by 19 publications

(12 citation statements)

References 68 publications

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“…In this sense, bacterial phytohormone production is consider an important phytostimulation mechanism due to the effects it has on plant development and growth enhancement under stressed conditions [9]. Furthermore, the HUTR05 genome encodes genes involved in exopolysaccharide (exoF, exoQ, and exoZ) and lipopolysaccharides (wadC, lptABC, and lptG) biosynthesis, as well as the enzyme coding genes related to cellulase production (EC 3.2.1.4), both polymers required for biofilm formation [32,33].…”

Section: Hutr05 Draft Genome Analysismentioning

confidence: 99%

Rhizobium laguerreae Improves Productivity and Phenolic Compound Content of Lettuce (Lactuca sativa L.) under Saline Stress Conditions

Ayuso-Calles

García‐Estévez

Jiménez‐Gómez

et al. 2020

Foods

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Lettuce (Lactuca sativa L.) is a widely consumed horticultural species. Its significance lies in a high polyphenolic compound content, including phenolic acids and flavonols. In this work, we have probed the ability of Rhizobium laguerreae HUTR05 to promote lettuce growth, under in vitro and greenhouse conditions (both non-saline and saline conditions). This strain has shown several in vitro plant growth promotion mechanisms, as well as capacity to colonize lettuce seedlings roots. We have analyzed the effect of the rhizobacterium inoculation on mineral and bioactive compounds in lettuce, under greenhouse conditions, and found a rise in the content of certain phenolic acids and flavonoids, such as derivatives of caffeoyl acid and quercetin. The genome analysis of the strain has shown the presence of genes related to plant growth-promoting rhizobacteria (PGPR) mechanisms, defense from saline stress, and phenolic compound metabolism (such as naringenin-chalcone synthase or phenylalanine aminotransferase).

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Section: Hutr05 Draft Genome Analysismentioning

confidence: 99%

Rhizobium laguerreae Improves Productivity and Phenolic Compound Content of Lettuce (Lactuca sativa L.) under Saline Stress Conditions

Ayuso-Calles

García‐Estévez

Jiménez‐Gómez

et al. 2020

Foods

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“…NifH encodes an important component of the nitrogenase enzyme, which has been used to identify potential N 2 fixing bacteria and to taxonomically assign N 2 fixing microorganisms (Rubio and Ludden, 2002; Gaby et al, 2018). NodA is an essential gene for the synthesis of the Nod Factor, which is an important signaling molecule during rhizobial infection of leguminous plants (Wang et al, 2018). Hence, microbes simultaneously harboring these two genes could be considered as candidate symbiotic microbes capable of fixing N 2 for leguminous host plants.…”

Section: Discussionmentioning

confidence: 99%

Functional assembly of root‐associated microbial consortia improves nutrient efficiency and yield in soybean

Wang

et al. 2021

JIPB

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Root‐associated microbes are critical for plant growth and nutrient acquisition. However, scant information exists on optimizing communities of beneficial root‐associated microbes or the mechanisms underlying their interactions with host plants. In this report, we demonstrate that root‐associated microbes are critical influencers of host plant growth and nutrient acquisition. Three synthetic communities (SynComs) were constructed based on functional screening of 1,893 microbial strains isolated from root‐associated compartments of soybean plants. Functional assemblage of SynComs promoted significant plant growth and nutrient acquisition under both N/P nutrient deficiency and sufficiency conditions. Field trials further revealed that application of SynComs stably and significantly promoted plant growth, facilitated N and P acquisition, and subsequently increased soybean yield. Among the tested communities, SynCom1 exhibited the greatest promotion effect, with yield increases of up to 36.1% observed in two field sites. Further RNA‐seq implied that SynCom application systemically regulates N and P signaling networks at the transcriptional level, which leads to increased representation of important growth pathways, especially those related to auxin responses. Overall, this study details a promising strategy for constructing SynComs based on functional screening, which are capable of enhancing nutrient acquisition and crop yield through the activities of beneficial root‐associated microbes.

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“…Furthermore, it is worth noticing that even Bradyrhizobia and Sinorhizobium symbionts of soybean also produce LCO-V(C18:1, Fuc/MeFuc) (D'Haeze & Holsters, 2002;Wang et al, 2018), making them also non cognate Nod-LCO signals. By studying the ability of M.…”

Section: Discussionmentioning

confidence: 99%

Distinct genetic bases for plant root responses to lipo-chitooligosaccharide signal molecules from distinct microbial origins

Bonhomme

Bensmihen

Olivier

et al. 2020

Preprint

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SummaryLipo-chitooligosaccharides (LCOs) were originally found as symbiotic signals called Nod Factors (Nod-LCOs) controlling nodulation of legumes by rhizobia. More recently LCOs were also found in symbiotic fungi and, more surprisingly, very widely in the kingdom fungi including in saprophytic and pathogenic fungi. The LCO-V(C18:1, Fuc/MeFuc), hereafter called Fung-LCOs, are the LCO structures most commonly found in fungi. This raises the question of how legume plants, such as Medicago truncatula, can perceive and discriminate between Nod-LCOs and these Fung-LCOs.To address this question, we performed a Genome Wide Association Study on 173 natural accessions of Medicago truncatula, using a root branching phenotype and a newly developed local score approach.Both Nod- and Fung-LCOs stimulated root branching in most accessions but there was very little correlation in the ability to respond to these types of LCO molecules. Moreover, heritability of root response was higher for Nod-LCOs than for Fung-LCOs. We identified 123 loci for Nod-LCO and 71 for Fung-LCO responses, but only one was common.This suggests that Nod- and Fung-LCOs both control root branching but use different molecular mechanisms. The tighter genetic constraint of the root response to Fung-LCOs possibly reflects the ancestral origin of the biological activity of these molecules.

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Conserved Composition of Nod Factors and Exopolysaccharides Produced by Different Phylogenetic Lineage Sinorhizobium Strains Nodulating Soybean

Cited by 19 publications

References 68 publications

Rhizobium laguerreae Improves Productivity and Phenolic Compound Content of Lettuce (Lactuca sativa L.) under Saline Stress Conditions

Rhizobium laguerreae Improves Productivity and Phenolic Compound Content of Lettuce (Lactuca sativa L.) under Saline Stress Conditions

Functional assembly of root‐associated microbial consortia improves nutrient efficiency and yield in soybean

Distinct genetic bases for plant root responses to lipo-chitooligosaccharide signal molecules from distinct microbial origins

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